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From Eternalgy

Solar PV Simulator with Full Transparency.

Better Clarity to build your next Solar Project.

Data Integrity // Independent Solar Audit System

SA

SolarAudit.my

Thinking of going Solar?

Get an unbiased, data-backed simulation of your potential savings based on real TNB tariffs and your specific lifestyle.

Input Parameters

RM
0 = Empty
9 = Max

Sarah from Eternalgy

Ready to explain...

Current Bill Analysis

Analysis Result

Monthly Savings Summary

REALISTIC

Experiment: Sun Peak Inflation

3.4 h

Move the slider to see how increasing sun peak hours (from real 3.4h up to inflated 5.0h) artificially "boosts" your ROI. Remember: You cannot control the sun!

Bill Reduction
RM 0.00
ATAP Export
RM 0.00
Net Monthly Saving
RM 0.00
Recommended System Size
0.0 kWp
Bill Before Solar RM 0.00
Bill After Solar RM 0.00
Export Credit RM 0.00
Self-Consumption
0 kWh

Used at home.

Surplus (Export)
0 kWh

Sold to Grid.

Avoid Common Estimation Traps

Severely Overestimating Sun Peak Hours

Real-world environmental factors—such as roof structure, orientation, shading, and local weather—typically result in lower effective Sun Peak Hours. In West Malaysia alone, yield differences can vary by up to 25% between locations. Using inflated figures to project system production and savings is strictly misleading.

Disregarding Real Electricity Bills for Savings Estimates

Many installer representatives lack the expertise to calculate specific bill rebates based on actual usage. Instead, they often rely on guesswork or cite 'best-case scenarios' from other clients with similar packages. This is a significant source of misinformation.

Severely Misjudging Offset vs. Export Ratios

While high offset rates (self-consumption) allow for greater savings, this is only possible if energy is consumed at home during peak generation hours. Providing savings estimates that do not account for the user's actual lifestyle and load profile is a serious misrepresentation of value.

Technical Appendix

Mathematical Logic & Formulas

01

Solar Generation

Daily yield is calculated by multiplying system size with peak sun hours. We apply a bell-curve distribution weight across 24 hours.

Total Daily kWh = System Size (kWp) × Sun Peak Hours
02

Offset (Self-Consumption)

This is the electricity generated by solar that you use immediately. It reduces your consumption from the grid.

Hourly Offset = Min(Hourly Usage, Hourly Generation)
03

Export (Surplus)

Any energy generated but not used is sent back to the grid. This creates a credit in your TNB account.

Hourly Export = Max(0, Hourly Gen - Hourly Usage)
04

Bill Reduction & Credits

Reduction is calculated by subtracting your new consumption from the original. Exports are credited at SMP rates (~RM0.27 - RM0.37).

Net Saving = (Original Bill - New Bill) + (Monthly Export × Export Rate)

The Science of Your Savings

We believe in total transparency. Most proposals use generic percentages, but we map your actual lifestyle blocks to simulated solar generation to find the "Missing Gap" in your ROI.

Step 01

The Lifestyle Block

We take your monthly bill and divide it into 24 hour slots based on your inputs. If you set 2pm to "9", we assume your aircond is running and assign a proportional share of your daily kWh usage to that hour.

Step 02

Solar Bell Curve

Solar generation isn't flat. It peaks at noon. We simulate a "Mountain Curve" (7am - 6pm) for your system size. We then layer this curve over your Usage Profile to see exactly where they overlap.

Step 03

The "Price Gap"

Every kWh you offset (Self-consumption) saves you at the full TNB rate (~RM0.50). Every kWh you export only gets credit at the SMP rate (~RM0.27). Our audit reveals if your installer is over-promising by assuming 100% offset.

Built for Malaysian Consumers // Data based on TNB Tariff 2025